Rails 4: ajax call to controller action returning 404 not found

Question

Ok Im like 1 hour trying to figure this out...

I have this action in my oferts_controller.rb

    def update_categories
     @categories = Category.children_of(Category.find(params[:categories]))
     respond_to do |format|
      format.js
     end
    end

This is what I have in routes.rb

get 'oferts/update_categories', as: 'update_categories'

This is what I have in my ajax call

$ ->
  $(document).on 'change', '#categories_parents_select', (evt) ->
    $.ajax 'update_categories',
      type: 'GET'
      dataType: 'script'
      data: {
        categories: $("#categories_parents_select option:selected").val()
      }
      error: (jqXHR, textStatus, errorThrown) ->
        console.log("AJAX Error: #{textStatus}")
      success: (data, textStatus, jqXHR) ->
        console.log("Dynamic country select OK!")

it is suposed that the update_categories action responds as a JavaScript, which is in app/views/oferts/update_categories.js.coffee

$("#categories_select").empty()
  .append("<%= escape_javascript(render(:partial => @categories)) %>")

well after I try to execute the ajax I get this in the logs

Started GET "/oferts/update_categories?categories=3&_=1427927753744" for 127.0.0.1 at 2015-04-01 17:36:01 -0500
Processing by OfertsController#update_categories as JS
  Parameters: {"categories"=>"3", "_"=>"1427927753744"}
  Rendered public/404.html (0.6ms)
Completed 404 Not Found in 38ms (Views: 36.8ms | ActiveRecord: 0.0ms)

Well if you see it is not even entering to the controller action, I tried adding puts inside the update_categories def in the controller but those are not printed in the logs. is this routing problem?

Thanks for you help.

Answer 1

I have once got this problem

finally, I find that the problem is in the filter

Could you have any filer in your controller and would you like post it for help?

Answer 2

The issue exists in not allowing such ajax methods in controller to pass even without any validation or authentication. You need to take a look in your controller either oferts_controller.rb or application_controller.rb . There must be some before_filter that is instead redirecting it to 404.

Thanks